Pipe-clamp.



. Patented Aug. 28, l90fl1.

w. w. STEWART.

PIPE CLAMP.

( lication filed May 2, 1900) APP (No Model.)

IATENT WARREN WALTER STEW'ART, OF STERLING COUNTY, TEXAS.

PIPE-CLAMP.

SPECIFICATION forming part of Letters Patent N 0. 656,755, dated August28, 1900. Application filed May 2, 1900. Serial No. 15,270. (No model.)

To all whom it may concern.

Be it known that Ll/VARREN WALTER STEW- ART, a citizen of the UnitedStates, residing in the county of Sterling and State of Texas, haveinvented a new and useful Pipe-Clam p, of which thefollowing is aspecification.

This invention relates to pipe-clamps for holding a pipe while beinglowered into or raised from a bored well, and has for its object toprovide an improved device of this character which is adjustable to fitany size of pipe and which may be conveniently and firmly clamped uponthe latter. It is furthermore designed to provide improved means fordrawing together the gripping members of the clamp, so as to obtainvarying degrees of pressure upon the pipe and also to provide forlocking such means, so as to prevent an accidental separation of themembers and a consequent dropping of the pipe.

With these and other objects in View the present invention consists inthe combination and arrangement of parts, asiwill be hereinafter morefully described, shown in theaccompanyingdrawings,andparticularlypointed out in the appended claims,it being understood that changes in the form, proportion, size, andminor details may be made within the scope of the claims withoutdeparting from the spirit or sacrificing any of the advantages of theinvention.

In the drawings, Figure l is a perspective view of a pipe-clampconstructed in accordance with the present invention. Fig. 2 is acentral longitudinal sectional View thereof. Fig. 3 is an end view ofthe device.

Corresponding parts in the figures of the drawings are designated bylike characters of reference.

Referring to the accompanying drawings, 1 and 2 designate the oppositemembers of the clamp, which are substantially duplicates and are formedfrom single blocks of wood in order that the clamp may be light as wellas strong, the other parts of the device being of metal. At one end ofthe clamp the corresponding ends of the members are beveled or roundedinwardly, as at 3, so that these ends may rock over each other inopening or closing the clamp upon the hinged connection of the membersformed by the opposite eyebolt-s 4- and 5, which have their eyesseatmember.

ed in the respective sockets or recesses 6 and 7, formed in the innerfaces of the members, and the eyes of the bolts being looselyinterlocked. The threaded ends of the shanks of the bolts extend atsuitable distances beyond the outer faces of the clamp members and areprovided with suitable nuts 8 and 9, whereby the bolts may be adjustedtransversely of the members, so as to form an adjustable hingedconnection therefor and to vary the distance between the members. Theopposite ends of the members are reduced so as to form the shoulders 10at opposite sides of each member and extending transversely in the samedirection as the eyebolts. Embracing the tongues 11, formed by thereduction of the members, is asubstantially U-shaped yoke or link 12,the opposite extremities of which are provided with a plurality ofcorresponding perforations 13 for sides of the link, the closed endthereof, and

the adjacent face of the contiguous clamp member. The cam-lever isfulcrumed at the juncture of the handle and the cam portion thereofbetween a pair of perforate bearingcars 17, that are driven into theouter face of the member 2 and upon a suitable pivotpin 18. The outerextremity of the cam or arcuate end of the lever is bifurcated, as at19, so as to form a fork, the members of which loosely embrace therounded transverse end of the link to form a pivotal connection therewith. A suitable pin 20 is passed through the tines or members of thefork and upon the outer side of the link, so as to prevent displacementof the latter from the lever.

In the operation of the device the lever is thrown outwardly, asindicated in Fig. 2 of the drawings, so as to separate the clamp membersupon their hinged connection and in order that the pipe may be receivedbetween the members, after which the free end of the lever is forced orclosed inwardly against the adjacent outer face of the member 2, therebydrawing the free ends of the clamp members together to bind upon thepipe. When the lever has been forced against the adjacent clamp member,a hook or catch 21, which is pivoted to the outer end of the hinged endof the member, is swung over the free end of the lever, which projectsbeyond the member for this purpose, whereby the lever is held in itslocked position to prevent accidental separation of the clamp members.It will now be apparent that the device may be accommodated to differentsizes of pipes by adjusting the eyebolts and the link 12 upon itspivotal connection with the member 1.

As indicated in Fig. 2, the outer face of the member 2 is provided witha groove or recess 22 for the reception of the cam end of the lever whenthe latter is thrown outwardly to open the clamp members. It will alsobe noted that the eyebolt 5 formsa support for the free end of the leverwhen the latter is held against the adjacent member.

The inner faces of the clamp members are provided with correspondinggrooves 23,which extend transversely across the members and are designedto register and form grooves for the reception of the pipes. Thesegrooves may be of different sizes to accommodate different sizes ofpipes and are preferably located adjacent to the hinged ends of themembers, so as to obtain the greatest amount of pressure upon the pipes.

What is claimed is- 1. A pipe-clamp, comprising opposite members, whichare hingedly connected at one end of the clamp, and have their innersides provided with corresponding notches for the reception of a pipe, aslotted link loosely embracing the free ends of the members, one end ofthe link being pivotally connected to one of the members, and theopposite end thereof projecting outwardly beyond the other member, acam-lever fulcrumed upon the outer side of said other member, and havingone end located within and pivotally connected to the projecting end ofthe link, the lever lying longitudinally at the outer side of theadjacent clamp member in the closed position of the device, and meansfor locking the free end of the lever against the adjacent clamp member.

2. A pipe-clamp, comprising opposite hingedly-connected members, whichhave their inner sides provided with corresponding notches for thereception of a pipe, a slotted link loosely embracing the free ends ofboth members, one end of the link being pivotally connected to one ofthe members, and the opposite end projecting transversely beyond theother member, a longitudinally-disposed cam-lever, having a bowed end,which is fulcrumed upon the outer side of the said other member, and itscam or bowed end being located within the projecting end of the link andalso provided with a notch pivotally receiving the adjacent end portionof the link, and a hook carried by the other member and arranged to holdthe free end of the lever against said member.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of'two witnesses.

WARREN WALTER STEWART.

\Vitnesses:

HALLEY KNIGHT, HENRY J ONES.

